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The aim of the study was to determine the effect of Sago effluent on the levels of growth hormone in the blood samples of the fresh water fish Clarias batrachus. The fish were exposed to control and different concentrations of treated sago effluents. The concentrations chosen were 25%, 50% and 75% of treated sago effluent. The levels of the growth hormone were increased in the blood sample of the experimental fish Clarias batrachus, when compared with that of controls.
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